source code
django.forms.Form --+ | ClipToGraticuleManipulator.Form
True
forms.FloatField(label= 'Northern boundary', required= False)
forms.FloatField(label= 'Southern boundary', required= False)
forms.FloatField(label= 'Eastern boundary', required= False)
forms.FloatField(label= 'Western boundary', required= False)
forms.CharField(widget= forms.HiddenInput)